Knife gauge



May 13, 1947. s. DONIGER 2,420,469

' KNIFE'GAUGE Filed Jan. 12, 1945 IIIHIIIIMW -23 "Ha i INVENTQR.,S'undel Don zge-r ATTORNEY Patented May 13, 1947 V,

UNITED STATES PATENT OFFICE KNIFE GAUGE Sundel Doniger, New York, N. Y.

Appiication January 12, 1945, Serial No. 572,524

6 Claims.

This invention relates to tools and more particularly to a, cuttin gaugefor knives.

The craftsman engaged in making such structures as model airplanes fromveneer or other thin material, requires narrow strips of the materialwhich should be straight and of even width. The material is so thin thatrip-sawing it is difficult, besides being wasteful, and for the homecraftsman usually not within his ability to accomplish with adequatedegree of perfection without a miniature power-driven bench saw. Theusual method employed is to slit the material by running a knife alongit several times until severed, guiding the knife with a straight-edgepressed down upon the material. An irregularity in the grain of thematerial or an inadvertent change of angle of the knife, however, willoften cause the knife to make a crooked slit and thus obtain an unevenstrip.

According to the present invention, I do away with the extraneousstraight edge, and overcome, also, possibility of change of angle of theknife.

Other object and advantages will appear as the description progresses,both by direct recitation thereof and by implication from the context.

Referring to the accompanying drawing in which like numerals ofreference indicate similar parts throughout the several views;

Figure 1 is aside elevation and Figure 2 is a plan of my invention,showing the same in use;

Figure 3 is an underneath view of the gauge;

Figure 4 is an end view looking from right to left at the device asshown in Fig. 1; and

Figure 5 is a longitudinal sectional view at the plane of the knife slitand showing a knife in operative position.

In the specific embodiment of the invention illustrated in said drawing,reference numeral ill designates a block-like body portion of the toolof the present disclosure, said body portion being longer than its widthor height and wider than its height. Said body portion may be of anysuitable material, of which metals and plastics are appropriateexamples.

The underside II of the body I ii is devoid of protuberances, so thesaid body may be slid steadily upon the surface of the material to becut with the underside I I of the body making extensive even contacttherewith. For guiding pur- I poses, however, a cleat or guide I2 ismovably attached to said underside II, extending longitudinally thereofand preferably for the full length of the body near one side edgethereof. To retain the cleat or guide I2 place, a screw grooves I6 nearthe front and back of the body.

Said grooves as shown extend entirely across the I underside Ii merelybecause the milling operation in mass production is more simple, but theused parts of said grooves are those in the vicinity of the cleat.

Said cleat H. has bosses I'I thereon which fit the grooves Iii and arecoextensive with the width of the cleat and consequently maintain thesaid cleat always parallel to the side edge of the body in any adjustedposition. Suitable markings on the cleat and body, as at I8, enable thecleat to be set and clamped at a predetermined gauging position,

The topside Id of the body, next its rear end,

is provided with a deep socket 20 shown as having a rounded bottomaxially parallel to the underside I I of the body and as having arounded forward end wall 2i axially sloping upwardly forward atapproximately to the axis of the rounded bottom wall of the socket.Longitudinally of the rounded bottom wall of the socket, preferably forthe full length of said socket, is a slot 22 which extends through thebody to the underside II. This slot 22 is of appropriate width to permitpassage of a blade 23 of a knife therethrough, the handle 2d of theknife preferably providing a longitudinal portion which can be held infirm engagement with the sloping end wall 2 I of the socket.

As shown, the axis of the said socket and the direction of said slot areat an angle, preferably 2 or thereabout, to the side edge of the deviceand in a direction such that the heel of the knife blade will be furtherfrom the'guide or cleat I2 than the toe of the blade. Thus when thedevice is drawn along a piece of material with the guide or cleatengaging the edge of the material and the knife blade making a cut, thetwist of the blade due to the angular disposition of said slot 22, tendsto ride the knife inward from the edge of the material. This tendency isopposed by the guide or cleat, and thus the cleat is kept in guidingcontact with the edge of the material and a straight out is effected.Length of the body is such that pressure exerted against the rear of theknife substantially normal thereto in the natural use of the device,exerts a moment of force which graphically reaches the underside l I ofthe body without intersecting the forward edge or face of the body.There is therefore no effective tendency to upset the body in sliding itwhile pushing against the knife.

I claim:

1. A tool of the character described comprising a body having anunderside for engagement with the face of material to be cut, a guide onsaid underside for engagement with an edge of said material, and saidbody having a blade slot open at the top, bottom and one end of the bodyfor a knife blade, said slot sloping from its open end longitudinallyaway from the guide at a predetermined fixed angle.

2. A tool of the character described comprising a body havin anunderside for engagement with the face of material to be cut, a guide onsaid underside for engagement with an edge of said material, and saidbody having a blade slot for a knife blade, said slot being disposed atsubstantially a 2 fixed angle with respect to said body and guide.

3. A tool of the character described comprising a body having anunderside for engagement with the face of material to be cut, a guide onsaid underside for engagement with an edge of said material, and saidbody having a socket for a knife handle and a, blade slot for the knifeblade, said slot being angularly disposed with respect to said guide.

4. A tool of the character described comprising a body having anunderside for engagement with the face of material to be cut, a guide onsaid underside for engagement with an edge of said material, and saidbody having a socket for a knife handle and a blade slot for the knifeblade, said slot being disposed at substantially a 2 angle with respectto said guide.

5. A tool of the character described comprising a body having anunderside for engagement with the face of material to be cut, a guideprojecting below the plane of the said underside for engagement with anedge of said material, and said body having a socket at its upper sidefor reception of a knife handle therein and having a, blade slot fromthe said underside and opening into the said socket, the forward end ofsaid socket sloping forwardly upward for obtainin extended engagementwith the knife handle with the said handle in correspondingly slopedposition.

6. A tool of the character described in accordance with claim 5, whereinthe slope of said forward end of the socket is substantially 45,

SUNDEL DONIGER.

REFERENCES CITED UNITED STATES PATENTS Name Date Ballard Apr. 18, 1854Number

